Machine for rolling metallic disks



Jan. 13, 1931. J.w. M1 TH 1 1,788,550

MACHINE FOR ROLLING METALLIC DISKS File d April 8, 5 ZY-SheetS-Sheet 1INVENTOR.

| By Jam/Minn.

: ,4 rroRNE:

Jan. 13,1931. .1. w. S MITH 1,788,550

' MACHINE FORIROLLING METALLICDISKS Filed'Aprii a, 1925 2 Sheets-Sheet 2INVENTOR.

W HNh/fininw v ATTORNEY.

Patent'd l3, 1931 UNITED STATES JOHN W. SMITH, OP PHILADELPHIA,PENNSYLVANIA, ASSIGNOB TO BUDD' WHEEL I COMPANY, OI PHILADELPEI. A,,PENNSYLVANIA, A CORPORATION OF -PENNSYL-.

VANIA PATENT OFFICE 1:40am roa noumo ununmc mans Application mm April 8,1m. swarm. 21,077.

My present invention relates to improvements in machines for rollingmetallic disks and, more particularly, to improvements in disk rollingmachines of the type described in my co-pending applications, Serial No.408,231, process of and a paratusfor rolling metalliccdisks, filedptember 4, 1920, Serial No. 414,848, machines for rolling disks, filedOctober 5, 1920, and Serial No. ($41,240, machines for rolling metallicdisks, filed May 24, 1923.

' In my pending a plications,I have described and claime machines forrolling metallic disks in which a blank is mounted upon a rotating tableand acted upon by rolls which are traversed radially of the blank as thetable rotates. These rolls are of such form that they have a combinedspinning and rolling action .upon the blank, which reduces it inthickness and increases its diam: eter, bringing the finished disk toany desired cross-section, depending upon the configurati'on of thetable or support for the blank or the line of traverse of the rolls. Thecombined rolling and spinning operation customarily proceeds outwardlfrom the center towards the periphery of t e blank, and, as the rollstravel outwardly,.the outer portion of the blank bends'upwardl assuminga frusto-conical shape so that t e rolls have a spinning action on thisportion of the blank,

7 as will appear from my copendingiapplicaspinning and rolling. actionon the blank, the

tions, above referred to. To facilitate such outer faces of the rollsare made conical, or tapered, or curved towards the axis to form atapered leading surface and, as the rolling operation proceeds, theupwardly flaring portion of the blank is brought into contact with theconical leading surfaces of the rolls. Inasmuch as all portions of theroll surface have the same angular velocity, the linear fore, there is aconsiderable difference in the linear velocity of said flarin flange andthe. conical:leadingsurfaces of t e rolls. These portions of-the rolls,accordin y, slide on the adjacent surface of .theblaniand, under theheavy pressures em loyed, this causes considerable friction and'heatwith consequent damage to the surface of the disk.

An object of my resent invention is' to provide a machine 0 this type inwhich this friction and generation of heat may be 010- y viated andavoided.

Another object of the invention is to provide a means by which theflaring flange generated on the blank being rolled may be sup-- portedand spaced from the end surfacesof the rolls by a freely rotatablesurface.

Another object ofthe invention is to provide an improved mountingstructure for the rolls, which isparticularly suitable for use with ananti-friction guiding or s acing collar and to provide asimple and eective guide roller and bearing therefor.

Further objects, and objects relating to details and economies ofconstruction and op- 'eration, will definitely appear from the detaineddescription tofollow. In one intstance, I accomplish the objects of myinvention by the devices and means set forth in the followingspecification. My invention is clearly defined and pointed out in theappended claims. A structure constituting a referred embodiment of myinvention is ilustrated in' the accom anying drawings,

forming a part of this specification, in which:

Fig. 1 is a view in front elevation of a machine embodying. myinvention, and

Fig; 2 is a sectional elevation of a portion of the machine, taken atapproximately theaxis of the roll bearings.

ill)

Fig. 3 is a detail view of the blank, rolls and anti-friction collarspriorto the commencement of the rolling operation.

In the drawin s, the same reference numerals refer to t e same partsthroughout the several views.

In my said pending applications referred to above, a blank to be rolledis supported on a rotating table and acted on by rolls which I movedradially of the blank, from ing surfaces for the upwardly a non-rotatingthe blank under pressure and are the center outwardly, while the blankrotates, the rolls being rotatably supported and being rotated bycontact with the surface of the blank on the rotating table. As therolls move radially outwardly under heavy pressure, the metal is reducedin thickness, causing the portion of the blank beyond the zone ofcontact of the rolls to flare upwardly towards the axes of the rolls.The ends of the rolls are, accordingly, conical so as to formleadflaring blank, In accordance with my present invention, the upwardlyflaring portion of the blank is guided and spaced from the end surfacesof the rolls, near their axes, by means of a freely rotating ring orcollar having a peri heral surface projecting slightly outside 0 theconical surface of the rolls and thus preventing contact of the blanksurface with the roll surfaces at points where the greatest friction andheat would be generated. The rotatin ring or collar is free to rotatewith the disk surface so that there is no friction between them. In myresent invention, also, the rolls are prefera ly not fixed to a rotatingshaft but are rotatably mounted on shaft, thus simplifying theconstruction and enabling the rolls to be more' easily removed from themachine, if that should be necessary.

Referring more particularly to the accompanying drawings, the inventionis .shown as ap lied to a machine similar to that disclose in myapplication, Serial No. 641,240.

engage In this machin'e, the blank, 10, to be rolled,

' tively.

- ments of the is supported on a rotating table, 11, rotated by suitabledriving mechanism from a driving pulley, base, 13. The blank is acted'onby a pair of rolls, 14 and 15, slidably supported, beneath, and guidedand pressed downwardly by a vertically movable carriage, 16, which isguided in its vertical movement by means of upright columns, 17,extending upwardly from the base, 13. The rolls, 14 and 15, are

- iven a suitablemovement radially of the lank and inwardly andoutwardly by means of a pair of bell crank levers, 18 and 19, pivotedat, 20 and 21,-respectively, on the carriage, 16, and connected at theirupper ends,- 22 and 23, to a vertically movable driving rod, 24, and, attheir lower ends, 25 and 26,

connected to roll carriers, 27 and 28, by

means of connecting links, 29and 30,respec.- The carriage, 16, is raisedand lowered by suitable mechanism and the movebell crank levers andcarriage are so arranged that, when the carriage is lifted, the rollsaremoved axially inwardly and, when the carriage is lowered, the rolls aremoved axially outwardly; The roll carriers are guided in their in andout movements in a guide-way, 31, in the bottom sur- 12, and supportedon a suitable face of the carriage, 16, and extending in the directionof the movement of the rolls.

Each roll carrier is provided at its inner end with a recess, 32, inwhich the roll, 14 or 15, respectively, is disposed. But one rollcarrier-and roll operating mechanism will be referred to hereinafter,inasmuch as the roll carriers are substantial duplicates of each other.The roll, 14, is supported on a shaft or spindle, 33, having spacedbearing surfaces, 34 and 35, the surface,- 35, being of less diameterthan the bearing surface, 34, and the shaft being tapered, at 36,between said surfaces so that it may be readily inserted fromthe innerend of the carrier. The shaft, 33, is also provided with a threadedstem, 37, projecting outwardly beyond the surface, 35, on which awasher, 38, and nut, 39, may be secured to hold'the shaft in the.carrier.

The roll, 14, is mounted on the portion of the shaft extending withinthe recess, 32, by means of a roller bearing, 40, having an innerraceway, 41, retained between an innel shoulder, 42, of the shaft and awasher, 43, secured tovthe inner end of the shaft by means of a nut, 44,threaded on a projecting threaded stem, 45. The outer raceway, 46, ofthe roller bearing is mounted within a housing or sleeve, 47, having awall, 48, with a cylindrical internal surface within which the racewayfits and having an end wall, 49, covering the end of the shaft, 33, andthe bearing, 40.. The roll, 14, is. mounted directly on the externalsurface of the cylindrical wall, 48, the outer surface of the wall andthe inner surface of the roll being tapered towards the inner end of theshaft so that the roll may be removed from the hous-.

ring flange, 56, also serves to hold the housing in a close, unitarystructure with the-ball and roller bearings.

This arrangement of the apparatus and manner of mounting the rollspermits the rolls to be readily removed from the su porting shaftswithout removin the sha s from the carriers, all that is requlred forthis purpose being to remove the ring or nut, 51, and slide the rollfrom the housing, 47. v The housing may, when desired, be removed bysimply unscrewing it from the ring flange, 56, thus giving access to theroller and ball bearings.

The rolls, 14 and 15, are provided with a narrow cylindrical surface,57, through I which a rolling pressure is applied to the blank, -10. Theouter. end of' the roll is rounded and tapered inwardly, preferablyforming a conical surface, 58, thus avoiding asharp outer edge andhaving a spinning action on the metal of the blank prior to its passingunder the cylindrical surface, 57.

As the rolls revolve, they engage the blank with a rolling pressurewhich causes the outradius, has a greater linear velocity thantheportion in contact with the c lindrical surface, 57. The surfaces,58, o the rolls and, 59, of the blank, have, therefore, a relativemovement or slip which, with the considerable pressure between them,would cause a heavy friction and consequent loss of energyv andgeneration. of-heat. This slip also results in a certain-undesirablemarring of disk surface. v

To avoid this friction, a rotatable ring or anti-friction collar, 60, ismounted on the housing ring, 55, ins'uch .a mannerthat it projectsbeyond the surface, 58, of the' roll and is free to rotate on the ring,To provide lubrication for this collar, a number of passages, 61, areprovided in the rin 55, communicating with theraceways' o the rollerbearing, 40. Through this arrangement, the flaring portion, 59 of the.blank, 10, is slightly s aced from the conical surfaces of the r0 8,exce t at points near the cylindrical surfaces, 5 by the collar, 60,

vcure by Letters Patent is hold a blank and, as the collar, 60, isfreely rotatable, no

ap reciable amount of frictionis' nerated. s changes of constructioncoul be made within the. scope ,of my invention, it is desired that allmatter contained in the above description or shown in the accompanyingdrawings shall be interpreted as illustrativ and not in a limitingsense.

Having thus described my invention, what I claim as new and useful anddesire to se- 1. In a machine of the type described, a roll having aleading surface tapering towards its axis and an anti-friction collar tofrom contact with the portions ofsaid surface-towards saidaxis. I

2. In a machine of the t described,a roll having a cylindrical ro 'ngsurface and an end surface tapered towards its axis, and

ertportions of the blank to flare upwardly as. in

'rolls-.movable radially towards an an anti-friction collar sup ortedadjacent said end surface to hold a lank from contact with the its axis.

3. In a machine of the type described, a roll having a cylindricalrollingsurface and a conical leading surface at one end, and ananti-friction collar at said conical end havportion of said end surfacenear ing an outersurface extending beyond said conical leading surfacefor holding a blank from contact with the roll. r

4. In a machine of the type described, a roll having a cylindricalrolhng surface and a leadin end surface tapered towards the axis of t eroll, and rotatable means at said leading end for guiding and s acingthe surface of a blank bein rolle with the said end sur ace.

5. In a machine of the type described, a pair of rotatable rolls movabletowards and from each other in the line of theiriaxes, said rolls havingcylindrical rolling surfaces-and outen end surfaces tapered towardstheir axes, and anti-friction collars mounted at the outer ends of saidrolls and each having an outer surface projecting outside the ta peredend surface of the correspondin roll to prevent contact of the surfaceof a lank therewith.

6. In a machine of the'type described, a-

rotatable blank supporting table, a air of. rolls movable radiallytowards an from each other on opposite sides of the axis of said tableand on the line of their axes,said

rolls having cylindrical rollin surfaces and taplered leading surfaces,an co ars mouned to prevent upturnedsurfaces of-said blank from rubbingon the inner por-' time of said ta ered leading surfaces.

7. In a machine of the type described, a rotatable .blanksupportingtable, a air of from each other on opposite sides of the axis of sandtable and on the line-of their axes and ham rolling surfaces pressing onand r0. tated y the surface of sa1d :blank, and means from contact 190anti-friction rotatable with said blank, independently of I said rolls,for preventing the upturned surface of said blank from contacting with.the outer end surfaces of said rolls. y

8. In a machine of the type described, a movable roll carrier, a shaftmounted in said carrier with its axis in the line of movement] of saidcarrier,,a-sleeve at one end oflsaid shaft, a roller bearing betweensaid sleeve and said shaft, a tapered surface on said sleeve and a rollmounted on said tapered surface.

9. In a machine of the type described, a movable roll carrier,-a shaftmounted in said carrier with its'axis in the line of movement of sa'idcarrier, a sleeve at one end of said shaft, a roller bearing betweensaid sleeve and said shaft, an anti-friction thrust bearing between saidsleeve and shaft, said sleeve bearings between said shaft and saidsleeve,

a roll rigidly mounted on said sleeve, and an anti-friction collarmounted on said sleeve at one end of said-roll.

11. In a machine of the type described, a movable roll carrier, a shaftmounted in said carrier with its axis in the line of movement of saidcarrier, a sleeve at one end of said shaft, anti-friction supporting andthrust bearings between said shaft and said sleeve, a roll rigidlymounted on said sleeve, an anti-friction collar mounted to rotate onsaid 'tleeve at one end of said roll and lubricant passages between saidanti-friction bearings and said collar.

12. In a machine of the type described, a roll carrier having a recessat one end, a shaft mounted in said carrier and projecting into saidrecess, roller supporting bearings and ball thrust bearings mounted onsaid shaft within said recess, a sleeve mounted on said bearings andcovering the end of said shaft and said bearings, a roll mounted on saidsleeve, and an anti-friction collar mounted in said recess at the innerend of said sleeve.

13. In a machine of the type described, a roll carrier having a recessat one end, a shaft mounted in said carrier and projecting into saidrecess, a sleeve surrounding the end of said shaft within said recess, aroller supporting bearing and a ball thrust bearing between said sleeveand said shaft, said sleeve having a tapered surface, a roll mounted onsaid tapered surface, a nut securing said roll on said surface, and ananti-friction collar rotatably mounted on the inner end of said sleevein osition to protect the inner end of 17. In a machine of the classdescribed, the

combination of a roll carrier, a spindle carried thereby, a sleevesurrounding the end of said spindle, anti-friction means interposedbetween said spindle and sleeve, means for retaining said sleeve uponsaid spindle, a roll carried by said sleeve, and a collar rotatable withrespect to said sleeve and mounted at one end of'said roll.

18 In a machine of the type described, a plurality of independentlyrotatable memers arranged longitudinally of each other, one of saidmembers having a rolling surface and an end surface tapered toward itsaxis, the other of said members having a blank engaging surface whichholds a blank from direct contact with the portions of said end surfaceofthe first-named member which are toward its axis.

In testimony whereof I aifix my si nature.

- J HN W. S

said roll rom contact with an upturned sur- 1 face of a blank beinrolled.

14. 'In a machine 0 the class described, the combination of a rollcarrier, 9. spindle detachably carried by said carrier, a sleevedetachably and rotatably mounted on said spindle without the rollcarrier, and a readily demountable roll mounted on said sleeve.

15. In a machine of the class described, the combination. of a rollcarrier, a spindle carried thereby .j ournaled within and projectingwithout said roll carrier, a sleeve surrounding the end of said spindleand detachably and rotatably mounted thereon, and a readily demountableroll mounted on said sleeve.

16. In a machine of the class described, the

combination of a roll carrier, a spindle carried thereby, a sleevedetachably and rotatably mounted on said spindle and having a taperedexternal surface, a roll mounted on said sleeve and havinga tapered borefitting

